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searcher: use naive line counting on big-endian

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This patches out bytecount's "fast" vectorized algorithm on big-endian
machines, where it has been observed to fail. Going forward, bytecount
should probably fix this on their end, but for now, we take a small
performance hit on big-endian machines.

Fixes #1144
This commit is contained in:
Andrew Gallant 2019-02-09 16:07:51 -05:00
parent f99b991117
commit a4868b8835
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1 changed files with 7 additions and 0 deletions
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7
grep-searcher/src/lines.rs
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@ -109,10 +109,17 @@ impl LineStep {
} }
/// Count the number of occurrences of `line_term` in `bytes`. /// Count the number of occurrences of `line_term` in `bytes`.
#[cfg(target_endian = "little")]
pub fn count(bytes: &[u8], line_term: u8) -> u64 { pub fn count(bytes: &[u8], line_term: u8) -> u64 {
bytecount::count(bytes, line_term) as u64 bytecount::count(bytes, line_term) as u64
} }
/// Count the number of occurrences of `line_term` in `bytes`.
#[cfg(target_endian = "big")]
pub fn count(bytes: &[u8], line_term: u8) -> u64 {
bytecount::naive_count(bytes, line_term) as u64
}
/// Given a line that possibly ends with a terminator, return that line without /// Given a line that possibly ends with a terminator, return that line without
/// the terminator. /// the terminator.
#[inline(always)] #[inline(always)]